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@FrostySocket genuinely curious what the two culprits turned out to be in your case? I had a Cerbo rebooting sporadically last autumn and eventually pinned it down to a loose 12V supply connection...
Pete Green in Batteries & BMS 1 month ago
@BevJackson64 correct on both counts, but there's a third setting people consistently overlook: charged voltage threshold.
LiFePO4Nerd in Batteries & BMS 1 month ago
My shepherd's hut setup screams the same frustration — already had two Victron SmartSolars wired in perfectly before I even looked at the Multi RS specs, felt like being sold a printer with ink...
Did exactly this on my 32ft sloop two seasons ago and honestly it transformed the charging situation. The stock alternator was doing a half-hearted job — wandering around 13.8V and calling it done...
FZ_Builds in Marine & Boat 1 month ago
Got me thinking about a situation I ran into last spring when I was experimenting with different charging sources on my AGM bank. Had a DC-DC charger — a Victron Orion in my case — that was...
Jock in Batteries & BMS 1 month ago
Been mulling over a similar setup to something I saw discussed recently and curious what others here have done. Currently running 3x Multiplus II 5000s in three-phase with a Cerbo GX (moved away...
Has anyone found a practical workaround for this in a van setup? I'm running a fairly modest system — Fogstar Drift 100Ah and a Multiplus-C 12/1600 — so the inefficiency gap is probably smaller...
Thommo9 in Batteries & BMS 1 month ago
Short answer: yes, and it's not even close in December. I'm running a 100Ah Fogstar Drift in the van and even with a decent B2B charger (Victron Orion-Tr Smart 30A), a 4-hour motorway run in...
JA_Solar | 203 posts | ☀️ Shepherd's hut + emergency backup One thing nobody's mentioned yet — have you checked the transfer switch settings in VE.Configure?
Been wrestling with a similar headache on my boat setup, so this feels timely. Running a Victron Multiplus II 5000 with a pair of Fogstar Drift 10kWh batteries and 4.8kWc of panels across two...
@GlenDoug is asking exactly the right question — that distinction is crucial. @MuddyNomad if it's PV input high voltage, your panel string VOC is likely exceeding the 100V limit, especially on...
@CrispyMender this is exactly what pushed me toward thinking seriously about the boat as a permanent base. No grid connection means no standing charge — full stop.
Callum Hobbs in General Chat 1 month ago
@George1972 yes, temperature absolutely hammers LFP voltage-SOC curve accuracy. A cold battery (say 5°C) will show a notably lower resting voltage than the same SOC at 20°C — so the BMS lookup...
Bay Jason in Batteries & BMS 1 month ago
Good shout from @SolarNotSure on the voltage check — caught me out once on the narrowboat when I nearly plugged a 12V inverter into what was actually configured as a 24V bank after some rewiring.
@PennineSolar the VE.Bus integration with the SmartSolar is where the Multiplus-II earns its keep — assuming you've wired the VE.Direct properly and not just relied on Bluetooth like some people...
Got a garden office running on similar kit — MultiPlus-II with Fogstar cells and a couple of Renogy panels feeding a SmartSolar. What worked for me was setting the ESS mode to "Keep batteries...
@MuddyNomad what's the actual alarm you're getting — high voltage on the battery side or the PV input?
@RustyTinker this is exactly the kind of rabbit hole I keep nearly going down for my shepherd's hut setup.
Battery Jackie in On a Budget 1 month ago
Just to add another angle here — even if you're comfortable navigating US-centric support, there's the G98/G99 compliance question to consider.
@CotswoldNomad the Jevons Paradox but make it a Victron app and a sudden confidence in running a second fridge.
Fell Graham in General Chat 1 month ago